Method of making and assembling expansion shields



June 11, 1940. R, E, MclNTQSl-l 2,204,373

METHOD OF MAKING AND ASSEMBLING EXPANSION SHIELDS Filed Sept. 7, 1938 3 Sheets-Sheet 1 INVENTOR I ATTORNEYS R. E. MQINTOSH 2,204,373

METHOD OF MAKING AND ASSEMBLING EXPANSION SHIELDS June 11, 1940.

Filed Sept 7, 1938 3 Sheets-Sheet 2 INVENTOR June 11, 1 940.

E." MOINTOSH METHOD OF MAKING AND ASSEMBLING EXPANSION SHIELDS Filed'Sept. 7, 1938 3 Sheets-Sheet 5 LL45 a lzL ATTORNEYS Patented June 11, 1940 Roy E. McIntosh,-New York, N. Y., assigiior to I Star Expansion Bolt Oompany,-,,N e w York, p

N. Y., a-corporation of Illinois Application September 7, 1938, Serial This inventionrelates to a method of and assembling expansion shields.

More particularly stated, the invention relates H to expansion shieldsof the type comprising a pair or a plurality of complementary sections which are laterally expansible into gripping engagement with a wall opening. Such shields asnow manufactured are made or cast in individual sections in poured molds and the sections areassembled manually to form the completed expansion shields.

This invention has for its. salient object to simplify the making and assembling of expansion shields of the character described thereby. cutting down the number of operations required.

Another object of the invention is to provide a simple, practical and efiicient method or process of economically manufacturing shields of the character described.

Further objects of the invention will appear from the following specification taken in connection with the drawings which form a part of this application, and in which Fig. 1 is an elevation partly in section illustrating one form of apparatus for carrying out the method, the parts being shown with the two sections of the press separated prior to the opera tion thereof; v 'Fig. 2 is a view similar to Fig. 1 showing the two parts of the press in an intermediate position before the assembling operation has been completed;

making Fig. 3 is a view similar to-Fig's. 1 and 2 but showing the two parts of the press in closed position after the press has completed the assembling operation;

Fig. 4 is a plan view partly in section taken substantially on line 4-4 of Fig. 1 looking in the direction of the arrows;

' substantially on line 55 of Fig. 3 j I Fig. 6 is an enlarged sectional elevation taken substantially on line 66 of Fig. 4; 1

'- Fig. 7 is a view similar to Fig. 1 but illustrat 4W ing a slightly modified form of apparatus adapted I for use in carrying out the method, thetwo parts of the press being shown in separated position; and

Fig. 8 is a view similar to Fig. '7 but showing 50 the two parts of the press closed.

'The invention briefly described consists of a method of and apparatus for making and as sembling sectional expansion shields comprising a; pair or a plurality of complementary sections. 5 The shield sections are first cast, preferably by Fig. 5 is an enlarged sectional elevation taken die castingin agroup'of interconnected units,

theunits being connected by casting sprues. The

sprue head on one of the castingsis severed and the castings are assembledwith one superposed on -the other to. bring the complementaryv sections intoassembling position. "The superposed castings are'then placed inapress; one portion and-the two-portions of the. press having coacting means for causing the'shield securing means carried by one set of the shield sections to embrace and secure the said sections to the com V plementar-y sections. 7

.The method briefly stated" consists ,of making andassemblingkexpansion shields comprising 'a pair or a plurality of complementary shield sections which are cast in interconnected groups, certain of the sections havin e bracing means or securing lugs engageable with other "sections,- assembling the interconnected groups of complementary sections, severing the connecting portions ofthe assembled sections and causing the embracing or holding lugs onione group of sections to embrace, and engage theother'sections. e

Further details of the invention will appear from :the following description. v E

-In the particular embodiment of the invention illustrated inFigs. 1-6 inclusive, there is shown a pair of interconnected groups of castings A and. B, each group comprising a plurality of half sections ll] which are connected together by of the sections lllhave formed thereon adjacent one .end thereof and at'the edges, lugs I5, l5

which are adapted to embrace and engage the complementary sections and secure the sections together; in the manner shown particularly in Fig. 5. I q

'These lugs are normally open, as shown at the right in Figs. 1'-3 inclusive.

If desired; all of the sections in 'one interconnected group may have lugs formed thereon and the complementary group have none. or, as

shown at the'ri'ght of Fig. 4,'the,lugs may be on the sections at one side of the Jgroupywhereas those onthe other side of the same group have In order to assist in properly alining the complementary superposed sections, certain of the sections are formed with recesses l1 which receive projections I 8 on the complementary sections. See Figs. 1, 4 and 5;

After the groups have been assembled iii-the,v

manner described, or one group has been superposed on the other, the superposed groupsfare placed on an anvil 20 of a press section 2|.

ing upwardly from the base 22 a pair of V-blocks 23 and 24 which, as shownin Fig. 5, coact with V-blocks. 25 and 26 carried by the head 2'! of an upper press section 28.- These two sets of V-blocks engage the lugs I5, I5 and close the lugs, causing them to embrace the corresponding portions of the complementary sections and thus secure the sections together.

The press section 28 has also formed thereon and extending downwardly therefrom guide rods 36 which, as shown in Fig. 4, coact with circumferential annular grooves in the shields to guide the shield sections and to properly position them in assembled relation.

The anvil 2D has formed thereon and extending upwardly therefrom cylindrical studs 3|, 3| which engage the inner surfaces of the outer sets of lateral sprues H and I2 to properly position the sprues on the anvil 2U. V

The head 2? of the upper press section 28 has extending downwardly therefrom bars- 32,. 32 which as the upper section is lowered are adapted to engage the inner end portions of the assembled shield sectionsand as the press section'28 moves downwardly to sever the inner ends of the assembled shield sections from the connecting sprues H, l2. This action is illustrated inFigs. 1-3 inclusive. In Fig. 2 the bars 32, 32 have moved downwardly into engagement-with the inner end portions of the assembled shield sections or of the upper sections and downward pressure is being exerted. In Fig. 3 the severing of the sprues has been completed by the continued downward movement of the breaker bars 32, 32. In this figure also as shown in Fig. 5, the upper and lower V-blocks have cooperated in, closing the lugs 55, (5 or causing these lugs to embrace the lower shield sections. i

In addition to using the apparatus and method to assemble the complementary shield sections, the two sections of the press 2| and 28 are also provided with means in the form of V-shaped knives 35 and 36 carried respectively by the press head 21 and the press base 22 for severing the sprue head of another interconnected group of sections shown at C. The action of the knives 35 and 36 is shown in Figs. 1-3 inclusive, and from the showing in Fig. 3 it will be seen that as the upper section of the press reaches its closed position the severing of the sprue head has been completed. g

It should be understood that the method of making and assembling complementary shield sections is not limited to the use of the apparatus shown in Fig. l, and Figs. 7 and 8 show a The. section 2| has also formed thereon and extend modified form of apparatus which may be used. In these figures are shown a pair of press members or sections it and The press section 40 has formed thereon supports 42, 42 for supporting the shield sections of the lower interconnected group. The upper section 4! of the press has extending downwardly therefrom a centrally disposed severing bar or block '63 which is adapted to engage the sprues i I, I2 and sever the sprues from the shield sections as the press member ll moves downwardly.

The two'press members fill and H are also provided with V-blocks to close the lugs l5, I5, similar to the V-blocks shown in Fig. 5, but in this case the upper V-block 35 is slidably mounted in the press section 41, but is pressed downwardly by a spring 46. This permits the V-blocks to move to closed position, such as the position shown in Fig. 5, and to close the lugs I5, [5 prior to the severing action of the block 43 on the sprues ll, l2.

Although certain specific embodiments of the invention have been particularly shown and described, it will be understood that the invention is capable of modification and that changes in the construction and in the arrangement of the various cooperating parts may be made without departingfrom the spirit and scope of the invention, as expressed in the following claims.

What I claim is:

l. The process of making and assembling interconnected groups of sectional expansion shields which consists .in die casting a plurality of complementary, longitudinally divided shield sections in an interconnected group, certain of the longitudinally divided sections having embracing means engageable with other divided sections in a manner to hold the sections in assembled relation, assembling interconnected groups of complementary sections, severing the connecting portions of the assembled sections and causing'the holding means on one group of divided sections to embrace and engage the other divided sections.

2. The process of making and assembling interconnected groups of sectional expansion shields which consists in die casting a plurality of complementary, longitudinally divided shield sections in an interconnected group, certain of the longitudinally divided sections having embracing Ineans engageable with other divided sections in a manner to hold the sections in assembled relation, assembling interconnected groups of complementary sections and during the same operation severing the connecting portions of the assembled sections and causing the holding means on one group of divided sections to embrace and engage the other complementary, divided sections;

3 The process of making and assembling interconnected groups of sectional expansion shields which consists in die casting a plurality of complementary, longitudinally divided shield sections in an interconnected group, certain of the longitudinally divided sections having embracing means engageable circumferentially with other divided sections in a manner to hold the sections in assembled relation, guiding and assembling interconnected groups of complementary divided sections, severing the connecting portions of the assembled sections and causing the holdin-g'means on one group of sections to embrace and engage the other sections.

4. The method of making expansion shields consisting of casting a group of unit portions of said shields connected together lby'casting sprues,

assembling therewith complementary longitudinally divided portions of said shields, said first named portions or said complementary portions having bendable lugs thereon adapted 'tocircumferentially embrace the other portions, pressing said lugs into holding relation and by the same pressing motion severingthe sprues to form completed shields. I i

5. The method of making expansion shields comprising'castin'g unit parts of said expansion shields in two identical interfitting groups, each group of saidgunits being integrally connected by sprues, unit members of each group having pairs of bendable lugs thereon adapted to engage sections which consists .of die casting a plurality of shield sections in two sprue connected groups, certain sections having means engageable with other sections for securing eornp1ementarysee-- tions together, asembling the groups of interconnectedsectio'ns,severing thev sprues which connect the sections in groups, causingthese curing means on certain sections to engage and embrace the said other sections and during the same operation severing the sprue head of a third interconnected group of sections.

'7. The process of making and assembling sectional expansion shields which consists of die casting a plurality of longitudinally-divided shield sections in an interconnectedgroup, onehalf of the sections of the said group having embracing means engageable with one-half of the sections of another interconnectedgrouplwhen one group is superposed on the other group, sup'erposing one group on another group, and

closing, said embracing means to connect complementary sections together. I

I 8. The processoi making and assembling sec- :tional expansion shields which consists of die 1 casting a plurality of shield sections in aninterconnectedgr oup, one-halfof the sections of each group having embracing means engageable with V; one-half of the sections of another interconnected groupwhen one group is superposed on the pthergroup, superposing one group on an:

other group, closing said embracing means to connect complementary sections together, and severing the connections between the sections of the groups; I

f ROY. E. McINTOS I-I. 

